How to use the arcgis.gis function in arcgis

def main():
    log = path.join(sys.path[0], 'email_log.log')
    with open(log, 'a') as log:
        try:
            with EmailServer(smtp_server, smtp_username, smtp_password, use_tls) as email_server:
                target = gis.GIS(orgURL, username, password)

                for email_service in email_services:
                    try:
                        if email_service['service url'] == '':
                            continue

                        for message in email_service['messages']:

                            # build sql
                            sql = "{} != '{}'".format(message['status field'], message['completed value'])
                            sql += " AND {}".format(message['query'])

                            feature_layer = FeatureLayer(email_service['service url'], target)
                            features = _get_features(feature_layer, sql)

                            for feature in features:

if new_item is not None:
                form.update_form(target, new_item, item_mapping)
                _add_message("Updated Form {0}".format(new_item['title']))

        existing_item = _search_org_for_existing_item(target, item)
        
        _add_message('Successfully added {0}'.format(item['title']))
        if existing_item:
            _add_message("New item id: {0}".format(existing_item['id']))
        _add_message('------------------------')
        return created_items

    except Exception as ex:
        if isinstance(ex, _ItemCreateException):
            _add_message(ex.args[0], 'Error')
            if isinstance(ex.args[1], (gis.Item, gis.Group)):
                created_items.append(ex.args[1])
        elif isinstance(ex, _CustomCancelException):
            if len(ex.args) > 0 and isinstance(ex.args[0], (gis.Item, gis.Group)):
                created_items.append(ex.args[0])
            _add_message("{0} canceled".format(item['title']), 'Error')
        else:
            _add_message(str(ex), 'Error')

        for created_item in reversed(created_items):
            try:
                if created_item is not None:
                    if created_item.delete():
                        if isinstance(created_item, gis.Group):
                            created_item['type'] = 'Group'
                        _add_message("Deleted {0} {1}".format(created_item['type'], created_item['title']))
            except Exception:

def _get_existing_item(existing_items, item, item_type="Item"):
    """Find the cloned item from a list of items.
    Keyword arguments:
    existing_items - The list of items to search through to find if the item has already been cloned.
    item - The original item to be cloned.
    type - The type of item being search, options are 'Item' or 'Group'"""

    if item_type == "Item":
        for existing_item in [i for i in existing_items if isinstance(i, gis.Item)]:
            if existing_item['type'] == item['type']:
                for keyword in existing_item['typeKeywords']:
                    if keyword == "source-{0}".format(item['id']):
                        return existing_item
    elif item_type == "Group":
        for existing_group in [i for i in existing_items if isinstance(i, gis.Group)]:
            for tag in existing_group['tags']:
                if tag == "source-{0}".format(item['id']):
                    return existing_group
    return None

def _get_existing_item(existing_items, item, item_type="Item"):
    """Find the cloned item from a list of items.
    Keyword arguments:
    existing_items - The list of items to search through to find if the item has already been cloned.
    item - The original item to be cloned.
    type - The type of item being search, options are 'Item' or 'Group'"""

    if item_type == "Item":
        for existing_item in [i for i in existing_items if isinstance(i, gis.Item)]:
            if existing_item['type'] == item['type']:
                for keyword in existing_item['typeKeywords']:
                    if keyword == "source-{0}".format(item['id']):
                        return existing_item
    elif item_type == "Group":
        for existing_group in [i for i in existing_items if isinstance(i, gis.Group)]:
            for tag in existing_group['tags']:
                if tag == "source-{0}".format(item['id']):
                    return existing_group
    return None